http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최이선,서정렬 한국부동산학회 2024 不動産學報 Vol.93 No.-
1. CONTENTS (1) RESEARCH OBJECTIVES The purpose of this study is to identify the characteristics that influence the determinants of apartment prices between high and low apartment prices within the same autonomous district in the regional submarket, and to further confirm whether there is a price gap between branded and non-branded apartments. (2) RESEARCH METHOD For this purpose, a multiple regression analysis was conducted targeting all apartments traded over the past three years in Buk-gu, Busan (Hwamyeong-dong, Mandeok-dong), using the actual apartment transaction price as the dependent variable and independent variables related to apartment structure, complex, location, and brand characteristics. (3) RESEARCH FINDINGS As a result of the analysis, the variables that commonly had a significant positive (+) influence on the actual transaction price were the year of occupancy and the number of apartments, while the variables that had a negative (-) influence were the exclusive use area. In Hwamyeong-dong, a high-price area, the distance to elementary schools, convenience facilities, and apartment brands had a positive (+) effect, while in Mandeok-dong, a low-price area, they had a negative (-) effect. 2. RESULTS This means that there may be a gap in apartment prices even within the same area, and even for non-branded apartments, the price may be higher than branded apartments if the area is close to a station or close to convenience facilities. In this study, these results were presented as marketing Unique Selling Point related to the supply of regional and non-branded apartments.
Effect of Oxidation-reduction Pretreatment for the Hydrogenation of Caster Oil over Ni/SiO2 Catalyst
최이선,김수영,고형림 한국공업화학회 2017 공업화학 Vol.28 No.3
Castor oil can be used as a useful raw material for chemical industries such as intermediates of surfactants through hydrogenationreaction. In this study, effects of the preparation method and pretreatment condition on the nickel catalyst for thehydrogenation of castor oil were investigated. The nickel catalyst was supported on the silica carrier by the precipitation methodwith different Ni contents, solution pH values, and precipitants. Repeated pretreatments of oxidation and reduction cycleswere then carried out. The activity of the nickel catalyst was measured by comparing the iodine value of the castor oil. Thedispersion of nickel on the catalyst was analyzed by X-ray diffraction (XRD), N2 adsorption-desorption, and transmission electronmicroscopy (TEM). The activity of nickel catalyst was also compared by CO oxidation experiments. The redispersionof nickel occurred on the silica by repeated oxidation and reduction cycles, and this effect contributed to promoting the castoroil hydrogenation activity.
최이선,김추연,유재욱 한국전략경영학회 2023 전략경영연구 Vol.26 No.3
Since several critical issues with the existing practice used to test for U- and inverted U-shaped relationships has been identified, Lind and Mehlum (2010) proposed a three-step testing procedure. Based on the three-step procedure proposed by Lind and Mehlum (2010), the present study thoroughly reviewed current practice in business research with regard to the full procedure to testing for U- and inverted U-shaped relationships. By reviewing a set of 24 relevant articles published in Journal of Strategic Management and Korean management review from 2010 to 2022, we found some cases where there is a lack of evidence for the inverted U-shaped relationship or that lead to misleading result interpretation caused by incorrect turning point estimation. Our further simulations reveal that Lind and Mehlum's procedure also has a problem because quadratic regression always assumes a quadratic functional form when the true relationship between x and y is not quadratic(e.g. logarithmic), thereby elevating the rates of false-positive results in testing for inverted U shapes. Therefore, this study proposed a procedure that can help identify inverted U-shaped relationships more accurately in various nonlinear relationships by obtaining an accurate turning point first based on exploratory data analysis and then estimating a linear regression lines for each of the two regions separated by the turning point. The results of the study can provide both academic and practical guidelines for investigating nonlinear relationships between variables necessary to explain theories and phenomena in the he field of management and economy. 독립변수와 종속변수 간의 역 U자형(U자형) 관계에 대한 연구가설 검증을 위해 사용되어 온 회귀모형의이차항 부호와 유의성 검증 방법에 대한 문제가 제기된 이후, 새로운 검증 방법론인 3단계 검증 절차가Lind and Mehlum(2010)에 의해 소개되었다. 본 연구에서는 Lind and Mehlum(2010)이 제시한3단계 검증 절차를 바탕으로 2010년부터 2022년까지 경영학연구와 전략경영연구에 게재된 논문 24편에적용된 역 U자형(U자형) 이차곡선 관계에 대한 가설 검정 방법의 적정성을 검토하였다. 그 결과 전환점위치 보고의 누락 및 이차곡선 관계로 해석하기 어려운 전환점의 위치, 전환점 기준 좌· 우 곡선 기울기의유의성에 대한 증거 부족 등의 문제를 발견할 수 있었고, 이에 따라 역 U자형(U자형) 관계에 대한증거가 불충분한 경우와 해석상의 오류가 발생하고 있음을 확인할 수 있었다. 또한 추가적인 모의실험결과, Lind and Mehlum(2010)의 검증 절차 역시 역 U자 형태가 아닌 곡선 관계를 역 U자 관계로식별하게 만드는 문제가 있음을 발견했다. 따라서 본 연구는 탐색적 분석 방법을 활용하여 먼저 정확한전환점을 구하고, 이를 기준으로 좌·우측 선형회귀선을 추정하여 그 기울기 부호의 방향 및 유의성을확인하는 방법을 통해 변인 간 다양한 비선형 관계 속에서 역 U자형 관계를 좀 더 정확하게 식별해낼 수 있는 구체적 절차 및 방법론을 제시하였다. 연구 결과는 역 U자(U자) 형태의 이차곡선 관계의규명뿐 아니라 경영·경제 분야의 이론 및 현상을 설명하는데 필요한 변인 간 곡선 관계 연구에서 유용한학문적, 실무적 지침을 제공할 수 있을 것이다.
Genetic 알고리즘을 이용한 능선회귀 상수의 결정에 관한 연구
최이선,염준근,정기문 조선대학교 통계연구소 2000 統計硏究所論文誌 Vol.2 No.1
We use biased estimators to detect multicollinerity and ridge regression estimator among biased estimators. Important problem here is determination of ridge constant in ridge regression estimator. To determine ridge constant there is method using variance inflation factor and ridge trace, scree diagram in graphic method. With method using ridge trace and scree diagram it is not easy to find ridge constant. Method using variance inflation factor determine ridge constant when expectation of variance inflation factor is to approximate "1" applying all possible ridge constant between zero and one. In this thesis we propose determination of ridge constant to detect multicollinerity using genetic algorithm. Ridge constant is converged quickly through experiment.
아동상담 과정에서 일방경 안에서의 어머니들의 체험: 치료놀이를 중심으로
최이선 한국정서행동장애학회 2017 정서ㆍ행동장애연구 Vol.33 No.2
The purpose of this study is to understand what parents in the observation room experience while watching their child. Also, the study offers that explores the essential meaning of peeking in the observation room through parents’ experience. This study was conducted on three mothers with children who participated in counseling children, Giorgi’s qualitative research method. The results of the analysis showed that <lack of support base>, <state at the time of child’s maladjustment and visiting the child counseling center>, <miscarriage>, <self-defense and fear, Heartache>, <perception of self>, <Change in the communication of the new appearance of the child>, <Mom’s effort / Modeling / Let’s remember the one’s body> and <Being friendly with dad>. Components are presented as turning, enlightenment, growth and change. Through the results of the research, the meaning of mothers’ experiences in one side mirror is ‘a series of process that encourage the constant interactions of children and therapist’, and it is also a part that can be naturally linked to parent education through this process. Therefore, it is meaningful to grasp intrinsic meaning through mother’s experience, to provide understanding of parent education, reflection on counseling setting scene, and empirical evidence of counseling practice. 본 연구는 아동상담 기법 중 치료놀이에서 관찰실에 있는 부모가 자녀의 회기를 보면서 경험하는 것은 무엇인지를 이해하고 부모의 경험을 통해 관찰실에서 들여다보기의 본질적인 의미를 탐색하는 연구이다. 치료놀이 아동상담에 참여한 자녀를 둔 어머니 3명을 대상으로 질적 연구방법인 Giorgi의 기술적 현상학으로 진행하였다. 분석결과 <지지기반부족>, <아이의 부적응과 센터 내원시 상태>, <잘못된 육아>, <자책감과 두려움, 속상함>, <자신에 대한 인식>, <대물림>, <놀이가 밥이다>, <아이의 새로운 모습 소통 변화>, <엄마의 노력/모델링/몸에 배게 하자>, <아빠와 친해짐> 등 10개의 구성요소가 도출되었다. 구성요소들은 돌아보기, 깨달음, 성장과 변화로 제시하였다. 연구결과를 통해 일방경 안에서의 어머니들의 체험의 의미는 ‘아동과 치료사의 한결같은 상호작용을 몸에 배이게 하는 일련의 과정’이며, 이러한 과정을 통해 부모교육으로 자연스럽게 연결될 수 있는 부분이기도 하다. 본 연구는 일방경 안에서의 어머니의 체험을 통해 그 경험의 본질적인 의미를 파악하며, 부모교육에 대한 이해와 상담세팅장면에 대한 성찰과 상담 실제의 경험적 증거를 제공하는데 의의가 있고 할 수 있다.